<template>
    <div class="list" ref="wrapper">
      <div>
        <div class="area">
          <div class="title border-topbottom">当前城市</div>
          <div class="button-list">
            <div class="button-wrapper">
              <div class="button">{{this.currentCity}}</div>
            </div>
          </div>
        </div>

        <div class="area">
          <div class="title border-topbottom">热门城市</div>
          <div class="button-list">
            <div class="button-wrapper" v-for="item of hotcitys" :key="item.id"
                 @click="handleCityClick(item.name)"
            >
              <div class="button">{{item.name}}</div>
            </div>
          </div>
        </div>

        <div class="area" v-for="(obj, key) of cities"
             :key="key"
             :ref="key"
        >
          <div class="title border-topbottom">{{key}}</div>
          <div class="item-list">
            <div class="item border-bottom"
                 v-for="item of obj"
                 :key="item.id"
                 @click="handleCityClick(item.name)"
            >
              {{item.name}}
            </div>
          </div>
        </div>
      </div>
    </div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapState, mapMutations } from 'vuex'
export default {
  name: 'List',
  mounted () {
    this.scroll = new Bscroll(this.$refs.wrapper)
  },
  props: {
    hotcitys: Array,
    cities: Object,
    letter: String
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  },
  methods: {
    handleCityClick (city) {
      // this.$store.commit('changeCity', city)    mapMutations 映射替换
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
  computed: {
    ...mapState({
      currentCity: 'city'
    })
  }
}
</script>

<style lang="stylus" scoped>
  .list {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    top:1.58rem;
    overflow: hidden;
  }
  .title {
    line-height: .54rem;
    font-size: .26rem;
    background: #eee;
    padding-left: .2rem;
    color: #666;
  }
  .button-list {
    padding: .1rem;
    padding-right: .3rem;
    overflow: hidden;
  }
  .button-wrapper {
    width: 33.33%;
    float: left;
  }
  .button {
    text-align: center;
    margin: .1rem;
    border: .02rem solid #ccc;
    border-radius: .06rem;
    padding: .1rem 0;
  }
  .item-list {

  }
  .item {
    line-height: .76rem;
    color: #666;
    padding-left: .2rem;
  }
</style>
